Item

Layer

Spring

Summer

Autumn

Winter

Oxygencontent

(ml O₂/L)

Surfacelayer

6.10

4.33

5.19

6.36

bottom

5.79

4.22

5.12

6.36

Oxygen saturated degree

(O₂%)

Surfacelayer

121

96

103

103

bottom

113

92.4

101

103

Phosphatic

(μmol P/L)

Surfacelayer

0.04

0.25

0.28

0.47

bottom

0.04

0.29

0.43

0.45

Silicate

(μmol Si/L)

Surfacelayer

0

6.50

17.20

18.10

bottom

0

5.40

16.80

19.10

Three kind of inorganic nitrogen (μmol N/L)

Surfacelayer

0.39

1.80

11.58

12.76

bottom

0.29

1.59

12.14

12.70

pH value

Surfacelayer

8.45

8.16

8.25

8.20

bottom

8.44

8.17

8.28

8.21

Alkalinity

(meq/L)

Surfacelayer

2.27

2.26

2.08

2.19

bottom

2.32

2.31

2.15

2.32

Salinity

(meq/L)

Surfacelayer

31.45

33.96

30.69

30.42

bottom

31.98

34.01

30.91

30.47

Water temperature

(˚C)

Surfacelayer

20.78

26.69

21.45

11.22

bottom

19.70

26.03

20.66

11.08

Planktonic flora

(×104 individual/cubicmeter)

1014.94

26.10

2.83